CN103947142B - Use the multicast service of unicast sub-frame - Google Patents
Use the multicast service of unicast sub-frame Download PDFInfo
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- CN103947142B CN103947142B CN201180075196.5A CN201180075196A CN103947142B CN 103947142 B CN103947142 B CN 103947142B CN 201180075196 A CN201180075196 A CN 201180075196A CN 103947142 B CN103947142 B CN 103947142B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- Mobile Radio Communication Systems (AREA)
Abstract
Disclose a kind of method that multicast service is provided with unicast sub-frame.Included using the method for transfer station：Using with generic cell identifier（CID）Multicast cells radio network temporary identifier（MC‑RNTI）The operation of multicast service is established in each in multiple mobile devices in multicast group.The physical downlink control channel shielded followed by use by MC RNTI（PDCCH）Physics downlink shared data channel is distributed for multicast group（PDSCH）The operation of resource.
Description
Background technology
Wireless mobile telecommunication technology transmits number using various standards and agreement between transfer station and wireless mobile apparatus
According to.Some wireless devices use OFDM via physical layer（OFDM）Digital modulation scheme is through being communicated.OFDM is marked
Accurate and agreement can include third generation partner program 3GPP Long Term Evolutions LTE, be commonly referred to as WiMAX by Industry body（Microwave
Access global-intercommunication）Institute of Electrical and Electric Engineers（IEEE）802.16 standard（For example, 802.16e, 802.16m）, with
And the WiFi standards of IEEE 802.11 are commonly referred to as by Industry body.3GPP radio access networks in LTE system（RAN）
In, transfer station can be enode b（It is often also indicated as strengthening node B, eNodeB, or eNB）And universal terrestrial radio
Access network（UTRAN）In radio network controller（RNC）Combination, the transfer station and be referred to as user equipment（UE）'s
Wireless mobile apparatus communicates.Downlink（DL）Transmission can be from transfer station（Or eNodeB）To wireless mobile apparatus（Or UE）
Communication, and up-link（UL）Transmission can be the communication from wireless mobile apparatus to transfer station.In downlink transmission
In, transfer station can be communicated using unicast services using unicast sub-frame with single wireless mobile apparatus.Alternately, transfer station can
To use multicast broadcast multimedia service（MBMS）Using multicast Broadcast Single Frequency Network（MBSFN）Subframe and multiple wireless mobiles
Equipment communication.
Brief description of the drawings
What disclosed feature and advantage will be apparent from the point of view of the detailed description of accompanying drawing is next combined, it is by means of showing
Example together illustrates disclosed feature；Also, wherein：
Fig. 1 illustrates the block diagram of the multicast service in the single subdistrict according to example；
Fig. 2 illustrates the block diagram of the multicast service in the multiple cell according to example；
Fig. 3 illustrates the block diagram of the radio frame resource according to example；
Fig. 4 illustrates with unicast sub-frame provides multicast service according to the transfer station of use one of example and three mobile devices
Instantiation procedure；
Fig. 5 illustrates the concentration radio access network according to example（C-RAN）Base Band Unit（BBU）And long distance wireless
Electric unit（RRU）The block diagram of configuration；
Fig. 6 depicts the flow chart for providing multicast service with unicast sub-frame by transfer station according to example；
Fig. 7 depicts the flow chart for providing multicast service with unicast sub-frame by mobile device according to example；And
Fig. 8 illustrates the diagram of the mobile device according to example.
With reference now to illustrated example embodiment, and specific language will be used to describe identical implementation herein
Example.But, it will be understood that：Thus it is not intended to limitation the scope of the present invention.
Embodiment
Before the present invention is disclosed and described, it will be understood that：This invention be not limited to specific structure disclosed herein,
Process steps or material, and extend into its equivalent that can be recognized by those skilled in the relevant art.It will also be understood that
It is：Term used herein is only applied to the purpose for describing specific embodiment, and is not intended to be restricted.In different figures
Same reference numerals represent identical element.It is for illustrated steps and operation in the numeral that flow chart provides with during
Clearly it is provided, and is not necessarily to indicate specific order or sequence.
Exemplary embodiment
The initial general introduction of technical em- bodiments is provided below, and then particular technology embodiment then by further in detail
Carefully describe.This initial summary is intended to help reader quickly to understand technology, the pass without being intended to equally described technology
Key feature or substantive characteristics, also it is not intended to limit the scope of claimed theme.
With the surge of the mobile device with video capability, conference call turns into and other visual telephone systems
The more and more common method of system and other mobile device communications.In 3GPP LTE networks, multicast and broadcast by with multicast it is wide
Broadcast Single Frequency Network（MBSFN）The mode of subframe uses multicast broadcast multimedia service（MBMS）To support.Multicast is from source
Message or information are delivered to one group of purpose equipment simultaneously in single transmission.Broadcast refers to that handle disappears in the single transmission from source
Breath or information are delivered to a big group purpose equipment simultaneously.Live broadcast of the MBSFN sub-frame for extensive spectators can be efficient
, but for other multicast services（Such as, video conference service）May not be efficient.Typically, in the lte networks, make
It is used for the unicast services of unicast sub-frame on the basis of one by one（Via mobile device）During video conference
Downlink video be delivered to each user.Unicast services are probably to deliver the inefficient mechanism of some multicast services, and this may
The multicast packet of duplication is individually delivered to by using unicast sub-frame by each mobile device and wastes radio access network
（RAN）Radio resource.
Multicast service can be performed using unicast sub-frame.Unicast sub-frame can be non-MBSFN sub-frame（Or non-MBMS
Frame）.Typically, mobile device business uses unicast sub-frame, unless the subframe is MBSFN sub-frame（Or MBMS subframes）Retain.
For multicast service, radio resource control is established between each mobile device that transfer station can be in multicast group
（RRC）Connection.Transfer station can use the multicast cells radio network temporary identifier with generic cell identifier（MC-
RNTI）, multicast service is established on multiple mobile devices in multicast group.As the part for establishing multicast service, transfer station
The information element in RRC signaling can be used（IE）Multicast configures each equipment notice MC-RNTI into multicast group.
In this example, transfer station can be that each mobile device distribution in multicast group is directed to response character（ACK）It is or no
Determine response character（NACK）The different physical uplink control channels of feedback resources instruction（PUCCH）Resource.PUCCH can be held
Carry the control information in up-link transmission.Then, transfer station can use the IE PUCCH in RRC signaling to configure to multicast group
In each mobile device notification its for ACK or NACK feedback resources instruction PUCCH resource distribution.In another example
In, transfer station can be the Signal to Interference plus Noise Ratio with less than predeterminated level（SINR）Multicast group in mobile device
Subset allocation be directed to ACK or NACK feedback resources instruction different PUCCH resources.In another example, transfer station can be with
The Scrambling seeds of the scrambler for being scrambled to the data in PDSCH and/or PDCCH are initialized using MC-RNTI.So
Afterwards, transfer station can use the physical downlink control channel shielded by MC-RNTI（PDCCH）Distributed for multicast group under physics
Line link shared data channel（PDSCH）Resource.
Mobile device can receive the MC-RNTI with the CID for multicast group from transfer station.MC-RNTI is believed using RRC
IE multicasts in order are shared between configuring multiple mobile devices in multicast group.As the part for receiving MC-RNTI, move
Dynamic equipment can receive the PUCCH resource distribution for the instruction of ACK or NACK feedback resources.Provided for the PUCCH of mobile device
Source distribution can be different from the PUCCH resource distribution of other mobile devices in multicast group.Then, mobile device can be from transfer station
Receive the PDCCH shielded by MC-RNTI.Mobile device can use MC-RNTI blind Detectings PDCCH.
Transfer station can transmit the data in the PDSCH by PDCCH configurations.Movement station can be received by PDCCH configurations
The transmission of data in PDSCH.Movement station can transmit ACK or NACK feedbacks after the transmission of data in receiving PDSCH.
Transfer station can receive ACK or NACK feedbacks from least one mobile device.When NACK feedbacks are received, transmission
Data can be retransmitted by standing.For the example of single subdistrict, transfer station can use the specific reference signal of cell（CRS）Or UE is special
Fixed reference signal（UE-RS）Transmission and/or re-transmission data.For the example of multiple cell, transfer station can use CRS or
UE-RS transmits and/or retransmitted data.When CRS is by use, then CRS interweaves（interlacing）Can be with disabled.
In another example, when NACK feedbacks are by from the subset mobile device in the subset of the mobile device in multicast group
During reception, transfer station can use mixed automatic repeat request（HARQ）Retransmit data.When the crc fails, subset mobile device
NACK feedbacks can be transmitted.Work as Signal to Interference plus Noise Ratio（SINR）Less than subset mobile device predeterminated level when, CRC can
Can failure.
Multicast service can be used for single subdistrict or multiple cell.Fig. 1 illustrates the transfer station 210 of single subdistrict 212.
Each mobile device 220A-D can be with transfer station radio communication.Fig. 2 is illustrated for multiple cells（Or multiple cell）212A-
C multiple transfer station 210A-C.Mobile device 220E-H can be via transfer station and each cell wireless communication 230.Multicast
Radio resource can significantly be saved for the downlink transmission of conference call by servicing.In the case of multiple cell, property
It can also be reduced and be improved by the interference from neighbouring cell.
Wireless communication system can be subdivided into the various pieces of referred to as layer.In LTE system, communication layers can include：
Physics（PHY）, medium access control（MAC）, radio link control（RLC）, PDCP（PDCP）, Yi Jiwu
Line electric resources control（RRC）Layer.Physical layer can include the basic hardware transfer assembly of wireless communication system.
The basic hardware transfer assembly of transmitter can include：For the channel by coding protection binary system data
Encoder, for being interleaved to prevent the interleaver of fade-out or scrambler, the mapper for improving reliability, be used for
The Beam-former that the data mapped is distributed in layer, for the inverse of the OFDM symbol that time domain data is modulated into frequency domain
Fast Fourier Transform (FFT)（IFFT）Modulator, the digital analog converter for the signal modulated being converted into analog signal（DAC）、
For transmitting the radio frequency of analog signal（RF）Transmitter.
The basic hardware transfer assembly of receiver can include：For receiving the RF receivers of analog signal, for mould
Intend the analog-digital converter that signal is converted into institute's modulated signal（ADC）, for the OFDM symbol in frequency domain to be demodulated to time domain data
Fast Fourier Transform (FFT)（FFT）Demodulator, noise and the channel of interference for estimating channel and/or occurring in the channel are estimated
Gauge, the multiple-input and multiple-output for combining demodulated signal（MIMO）Decoder, de-mapping device, deinterleaver or descrambling code
Device, the channel decoder for generating binary system output data.The physical layer of transmitter and/or receiver can include other groups
Part, it is such as, serial-to-parallel（S/P）It is converter, parallel-to-serial（P/S）Converter, cyclic prefix（CP）Inserter and deletion
Device, protection band inserter and canceller and other desired components.
In one example, the data in wireless mobile communications can use general Long Term Evolution（LTE）Frame structure is by passing
See off（Or eNodeB）Physics in downlink transmission（PHY）Mobile device is sent on layer（Or UE）（As schemed in Fig. 3
Show）.Although LTE frame structures are illustrated, the standards of IEEE 802.16（WiMax）, the standards of IEEE 802.11（WiFi）Or make
It can also be used with the frame structure of OFDM another type communication standard.Up-link transmission can have and downlink
Transmit similar frame structure.
In the example illustrated in figure 3, the radio frame 100 of the signal for transmitting data may be configured to have tool
There are 10 milliseconds（ms）Duration T f .Each radio frame can be divided or be divided into 10 subframe 110i, and it is 1ms
It is long.Each subframe can be further subdivided into two time slots 120a and 120b, and each has 0.5ms duration
T s/ot .First time slot（#0）120a can include physical downlink control channel（PDCCH）160 and/or physical down link
Shared channel（PDSCH）166, and the second time slot（#1）120b can be including the use of PDSCH data.By transfer station and reception
The component carrier that station uses（CC）Each time slot can include multiple resource blocks based on CC frequency bandwidths（RB）130a、
130b, 130i, 130m and 130n.Each RB（Physics RB or PRB）130i can include 12-15 kHz subcarrier 136（In frequency
On rate axle）With each subcarrier 6 or 7 OFDMs（OFDM）Symbol 132（On a timeline）.It is if short or normal
Cyclic prefix used, then RB can use 7 OFDM symbols.If the cyclic prefix of extension is used, RB can make
With 6 OFDM symbols.The resource block can be mapped to 84 resource elements using short or normal cyclic prefix（RE）
140i, or the resource block can be mapped to 72 RE by the cyclic prefix using extension（It is not shown）.RE can be one
OFDM symbol 142 is multiplied by a subcarrier（That is, 15kHz）146 unit.In QPSK（QPSK）The situation of modulation
Under, each RE can transmit two 150a and 150b information.Other kinds of modulation can be used, such as, in each RE
16 quadrature amplitude modulations of the middle larger digit of transmission（QAM）Or 64 QAM, or less digit is transmitted in each RE（It is single
Position）Binary phase shift keying（BPSK）Modulation.RB can be configured for the downlink transmission from eNodeB to UE, or
RB can be by for the up-link transmitting configuration from UE to eNodeB.
Reference signal can be transmitted in resource block via resource element by OFDM symbol.Reference signal（Or pilot tone letter
Number or pilot tone）Can be because of a variety of causes（Such as, the noise in channel and/or channel is estimated）And the known signal used.
Reference signal can be received by transfer station and mobile communication equipment and transmission.Different types of reference signal can be used in RB
（RS）.For example, in LTE system, downlink reference signal type can include the specific reference signal of cell（CRS）, it is more
Broadcast Broadcast Single Frequency Network（MBSFN）Reference signal, UE specific reference signals（UE specific RS or UE-RS）Or demodulated reference signal
（DMRS）, location reference signals（PRS）And channel state information reference signals（CSI-RS）.
CRS can be transmitted in the downlink subframe in the cell for supporting PDSCH.Data can be by via PDSCH
UE is sent to from eNodeB.PDCCH be used to transmit down link control information（DCI）, down link control information notice UE
On the resource allocation related to the downlink resource allocations on PDSCH or scheduling.PDCCH also be used to transmit up-link
Control information（UCI）, uplink control information（UCI）Notify UE on uplink resource license and up-link power
Control command.PDCCH can be transmitted being sent to from eNodeB in UE each subframe before PDSCH.Work as physical multicast
Channel（PMCH）When being transmitted in the MBSFN subframe, MBSFN reference signals can be transmitted.UE-RS or DMRS can supported
Transmitted in PDSCH downlink subframe.UE-RS（DMRS）Can be for downlink sharied signal channel（DL-SCH）Transmission point
Particular terminal is sent in the resource block matched somebody with somebody（Mobile communication equipment）, can be used for being formed to using the single UE of multiple antennas
Wave beam, and demodulated for PDSCH.PRS can be transmitted in the RB in the downlink subframe for PRS transmitting configurations, but
Physical Broadcast Channel can not be mapped to（PBCH）, master sync signal（PSS）Or subsynchronous signal（SSS）.CSI-RS can be with
It is used for downlink channel quality.
, can be with using the multicast service of unicast sub-frame under this background of physical layer descending chain circuit and uplink channel
It is described in another example.Fig. 4 is illustrated using a transfer station（eNB）With three mobile devices（UE1, UE2 and UE3）With
Unicast sub-frame provides the instantiation procedure of multicast service.ENB can establish RRC with each in the UE in multicast group and be connected
（302a, 302b and 302c）.Although three UE are illustrated, any amount of UE can form multicast group.RRC signaling is being sent out
Send and handle control plane signaling via the communication link of layer 3 before the PDCCH for subframe.UE RRC agreements and function can wrap
Include connection establish with release, the broadcast of system information, radio bearer establish/reconfigure with discharge, RRC is connected and is moved through
Journey, page notification and release, and/or open sea wharf.RRC signaling can also be used to dispatch and search for for blind decoding
PDCCH search space.One RRC connection can open to UE at any given time.RRC connection foundation can be used to carry out
From RRC idle pulleys to the transformation of RRC connection modes.Transmitting application data（Such as, internet, transmission are browsed or receives electricity
Sub- mail carries out video conference）Or before completing signaling procedure, each UE carries out the transformation to RRC connection modes.RRC connects
Connecing the process of foundation can be started by each UE, but can be by UE or network-triggered.RRC signaling can be by via information element（IE）
（Such as, PDSCH, PUCCH can be defined connected with the RRC of the configuration information of PUSCH physical channels and establish message）Transmission.
ENB can define the MC-RNTI with CID of each multicast group.Cell-radio network temporary identifier（C-
RNTI）Allow eNB identify UE and with the UE direct communications.C-RNTI can be by eNB distribute UE identifier, and by
It is unique in one cell of that eNB controls.When the ue moves to a new cell, C-RNTI can be reallocated.It is logical
Each UE in cell is allowed to receive the decode identical downlink transmission simultaneously with CID.ENB can use RRC signaling to
Participate in each UE notices MC-RNTI of multicast group.In other words, being used on each UE that eNB can be in multicast group includes IE
The RRC signaling of multicast configuration establishes multicast service（304a, 304b and 304c）.IE multicasts configuration can include having general CID
MC-RNTI.
In another example, UE can be distributed the different PUCCH resources for the instruction of ACK/NACK feedback resources by eNB
Distribution, whereinnIt is FDD（FDD）And time division duplex（TDD）The PUCCH format 1a/1b of ACK/NACK feedbacks day
The sub-frame number of the transmission of HARQ-ACK on line end mouth p.ENB can use the IE PUCCH in RRC signaling to configure to multicast
Each UE in group notifies its PUCCH resource distribution for the instruction of ACK or NACK feedback resources.In another example, pass
Delivery quality factor can be based on by seeing off（Such as, Signal to Interference plus Noise Ratio（SINR）, it is less than predeterminated level, or instruction
Bad CQI（CQI）Report, bad precoding matrix indicators（PMI）Report or bad transmission grade instruction
Symbol（RI）The level of report）, it is that the subset allocation of UE in multicast group is directed to the different PUCCH of ACK or NACK feedback resources instruction
Resource.
ACK can be as in response to transfer station（ENB's）The response of the transmission of message（That is, to the confirmation of dispatching station
Response）By receiving station（UE）The transmission control character of transmission.When message, which is not correctly received or transmitted mistake, to be occurred, NACK can
To be transmitted by receiving station.After the scheduled time for receiving ACK or NACK has expired, NACK can be automatically generated by eNB.It is predetermined
Time can be the default time set by eNB or UE, or the time that can be determined by the application for generating the data that will be transmitted.
Mixed automatic repeat request（Mix ARQ or HARQ）Can be high-speed forward error correction coding and detectable but unrecoverable error
Automatic repeat request by mistake（ARQ）The combination of Wrong control.In standard ARQ, redundant digit is used error detection code（It is all
Such as, CRC（CRC））It is added to the data that will be transmitted.In the harq, it is able to carry out forward error correction（FEC）
And error detection（ED）（Such as, Reed-Solomon codes, convolutional code or Turbo code）The code of the two can be used, with
During dependent on ARQ to correct using the redundancy uncorrectable error sent in the initial transmission, the vicious subset of correction institute.
Therefore, HARQ can be better carried out than the common ARQ under bad signal conditioning, but may be with notable under the conditions of good signal
Relatively low handling capacity obtains for cost.
ENB can be sent to PDSCH with dynamic allocation of resources and in single transmission each UE in multicast group
（UE1, UE2 and UE3）（306a, 306b and 306c）, the PDSCH can be by each UE decodings in multicast.There is provided for step
Rapid 306a, 306b and 306c's is described in further detail, and eNB can send PDCCH for PDSCH resource allocation.The PDCCH can be with
Shielded by MC-RNTI.MC-RNTI or C-RNTI can be used by decoder or scrambler, and UE is sent to allow UE to receive plan
Transmission.Shielding PDCCH allows the UE with matching MC-RNTI to decode message.The scrambler seed of scrambler or decoder can
There is general CID to be used（Such as, CID=0）MC-RNTI initialization, with to payload carry out scrambler, wherein described
Payload can be the data on PDSCH.Data（Such as, conference call）It can be transmitted via PDSCH.
At UE, MC-RNTI blind Detectings that each UE can be transmitted before use（Blind decoding）PDCCH.For multicast point
With example, each UE can decode PDCCH and PDSCH, and ACK/NACK responses are fed back to eNB（308a, 308b and 308c）.
When ACK/NACK feedbacks are activated, eNB can retransmit message in the case of transmission mistake occurs（310）.Transmitting mistake can
Indicated with being fed back by NACK.Retransferring can be by based on a certain subset criteria（Such as, delivery quality factor）And provide to more
Broadcast the subset of UE in all UE or the multicast group in group.For example, the deferred constraint that eNB can rely on application sends one or two
Retransmit.Re-transmission can be transmitted to send using unicast or multicast.In another example, ACK/NACK feedbacks can not be opened
With, and there is no retransmitting message to occur.
Because the quantity for the OFDM symbol that UE may be only notified in the control area of subframe and UE may be provided without
Corresponding PDCCH position, so UE can perform blind decoding.UE can by during blind decoding is referred to as monitor and
Decoding is directed to one group of PDCCH candidate of the DCI in each subframe（Multiple OFDM symbols in the control area of subframe）To search
UE PDCCH.
In receiver end（UE in downlink）, performing solution precoding, symbol combination, symbol demodulation and descrambling it
Afterwards, because UE may be unaware that detailed control channel structure（Quantity and each control channel including control channel（CCH）
The control channel element being mapped to（CCE）Quantity）, so UE can perform blind decoding at PDCCH payload.It is more
PDCCH can be transmitted in a single sub-frame, and single subframe can be with（Can not also）All it is relevant to specific UE.UE can pass through
Monitor one group of PDCCH candidate in each subframe（One group of continuous CCE that PDCCH can be mapped thereon）Come search specific to
UE PDCCH.UE can use its radio network temporary identifier（RNTI）Carry out attempting for compromise code candidate.RNTI can by with
In the CRC of screen unlocking PDCCH candidates（CRC）.If no crc error is detected, UE can be PDCCH
Candidate takes that successfully decoding is attempted as, and can read successfully the control information in candidate.
For the example of single subdistrict, eNB can use CRS or UE-RS transmission and/or retransmitted multicast service data.It is right
In multiple cell or the example of multiple cell, eNB can transmit and/or retransmit data using CRS or UE-RS.If CRS is made
With then CRS intertextures can be with disabled.CRS, which interweaves, shifts CRS and/or Data Units specific frequency, it is applied to specific
Cell and cell id.Because multiple cell can be used, the multicast that CRS intertextures can be bel not applied in multiple cell takes
Business.Interleaver can perform CRS intertextures.
In addition to the option to have come into question, when the enormous amount of user involved in multicast group, at least two
ACK/NACK feeds back and HARQ retransmits option and can used.In this example, eNB can be based on a certain standard（Such as, weak SINR
Or retransmission quality factor）The HARQ enabled for the subset of user is retransmitted and ACK/NACK.PUCCH in multicast configuration MAC IE
Resource allocationThe subset for the UE that can be provided in multicast group, therefore, the ACK/NACK for being only from the subset UE are anti-
Feedback can be effective.In another example, ACK/NACK can be with disabled, and it can be similar to MBMS frameworks.MBMS is passed
Send and fed back without using ACK/NACK.
Can be with more efficient using the multicast service of unicast sub-frame, and provide than the MBMS or list in special MBSFN sub-frame
Broadcast the high reliability of unicast services in subframe.MBMS and unicast services are being supported to wish a small group multicast users reliably transmitted
Aspect is not efficient, and this can be fed back by ACK/NACK provides.
In another example, multicast service can be provided by the processing module in transfer station and transceiver.Processing module
It may be configured to：Generation is had general CID MC-RNTI, PDSCH resources are distributed using PDCCH and uses MC-RNTI screens
Cover PDCCH.In addition, processing module may be configured to：The PUCCH resource indicated for ACK or NACK feedback resources is distributed
It is generated at least two mobile devices.With PUCCH resource distribution multicast group in each mobile device can with tool
There is the PUCCH resource distribution that other mobile devices of PUCCH resource distribution are different.Transceiver module may be configured to：Use
IE multicasts in RRC signaling configure is sent to mobile device PDCCH and MC-RNTIC.In addition, transceiver module can by with
It is set to：PUCCH resource distribution is sent to each mobile device using RRC signaling, received from least one mobile device
ACK or NACK feedbacks simultaneously retransmit mixed automatic repeat request when NACK feedbacks are received or generated by transfer station（HARQ）.
Concentration, cooperation or cloud radio access network can be used using the multicast service of unicast sub-frame（C-RAN）It is real
It is existing.In C-RAN, transfer station（Or eNodeB）Function can be in Base Band Unit（BBU）Processing pond and remote radio unit
（RRU）Or remote radio heads（RRH）Between be subdivided, wherein BBU is connected to RRU by optical fiber.C-RAN architectures can be with
High-efficiency delivery for the unicast sub-frame of multicast service provides platform.C-RAN purpose and component is by brief review.
The surge of mobile broadband internet has increased transfer station（Such as, eNodeB）With the shifting on the core network in RAN
Dynamic Internet service and load.Typical RAN architectures can include the eNodeB for being connected to the fan antenna of fixed qty,
The fan antenna with coverage cell domain and can handle transmission/reception signal in sector coverage area.It is in addition, typical
RAN may be disturbed limitation, therefore improve spectrum capabilities and may be limited.
C-RAN can provide focus on, cooperative wireless electricity and real-time cloud architecture RAN.Concentrate signal transacting can be with
Greatly reduce the quantity with the field apparatus room needed for traditional RAN covering same areas.With by remote radio unit（RRU）
The cooperative wireless electricity of the spaced antenna of equipment can provide the spectrum efficiency higher than traditional RAN.Based on open platform and biography
See off virtualization real-time cloud architecture can realize processing power polymerization and dynamically distributes, this can reduce power consumption simultaneously
Increase architecture utilization rate.C-RAN can provide the cost and relatively low energy expenditure, higher spectrum efficiency of reduction, branch
Multiple standards and smooth evolution are held, and is improved to the Internet service of terminal temperature difference.
The typical characteristics of mobile network are that mobile device is continually moved to another place from one place.Mobile device
Movement can have time geometry trend.Between at work, a large amount of mobile devices are moved to center Office Area from residence area
Work is gone in domain and industrialized regions.In night or non-working time, mobile device moves back to residence area（For example, family）Or the public place of entertainment
Domain.Therefore, network payload is moved in a mobile network using similar pattern.
More specifically, each eNodeB disposal ability can be made by the movable mobile device in eNodeB cell ranges
With.When mobile device is moved to the outside of eNodeB cell ranges, eNodeB can keep idle, at the same time most
ENodeB processing powers are wasted.In the macrovision figure of mobile network, the eNodeB in residence area or recreational area is working
Time may be most of idle, and the eNodeB in center Administrative Area and industrialized regions on one's own time may be most of
It is idle.C-RAN architectures can allow eNodeB processing at work between and the non-working time during in house and/or amusement
Used in region and center office and/or industrialized regions, therefore balance network payload and reduce the sky of eNodeB processors
Between idle, and increase eNodeB overlay area.
As illustrated in Figure 5, C-RAN can include three parts：By the remote radio unit with antenna（RRU）
The long distance wireless battery 430 including Base Band Unit of 432A-I equipments（BBU）412A-C Base-Band Processing pond 410 and physics pass
Optical fiber or cable 422A-D and 424G in defeated network 420, at least one RRU in its long distance wireless battery are connected to base band
At least one BBU in pond.Base-Band Processing pond can be centralized.Each BBU can include high performance general processor, reality
When virtualization processor, and/or physics（PHY）Layer processor and/or MAC layer processor 414A-F.BBU can be by via electric
Or optical cable connection 426C is coupled to counterweight balance device and interchanger 418A-B.Physical transfer network can be the biography of low latency
Defeated network, bandwidth-efficient network, and/or the optical transport network 420 connected using optical fiber or optical cable.In another example, thing
It can be high speed electrical communications network to manage transmission network.Physical transfer network can provide physical communication chain between BBU and RRU
Road.Physical communication link can include fiber link or wired electric link.BBU can be referred to as radio control of element device
（REC）.RRU can be referred to as remote radio heads（RRH）, remote radio devices（RRE）, relay station（RS）Or radio
Equipment（RE）.It can separate selected distance with BBU per RRU.For example, each RRU can separate at least 50 meters with BBU.So
And actual design and layout may rely on system specifications.Each RRU actual range can be more than or less than 50 meters.Each
RRU can include mobile device（Such as, user equipment（UE）434A-J）Sector, cell or overlay area 438E, wherein moving
Dynamic equipment can be located in multiple sector, cell or overlay area.C-RAN distributed RRU can to RAN provide high power capacity and
Wide overlay area.
RRU 432A-I can it is smaller, be easier to install, be easier to maintain, and consume less work(than BBU 412A-C
Rate.Base-Band Processing pond 110 can assemble BBU processing power by real-time virtual technology, and signal handling capacity is carried
The virtual BTS or RRU being supplied in the pond.Physical transfer network can be handled signal distributions to long distance wireless battery
RRU in 430.The BBU ponds of concentration can reduce the quantity of the transfer station room for BBU, and can make resource polymerization and big
Cooperative wireless electricity transmission/reception of scale is possibly realized.Transfer station room can be for accommodating the BBU in BBU ponds and other transmission
The canyon for processing equipment of standing.Can be by BBU processing using the multicast service of unicast sub-frame, and it is sent to multiple RRU.
Another example provides the method 500 for providing multicast service with unicast sub-frame by transfer station（Such as the flow in Fig. 6
Shown in figure）.Shown method includes：Using with generic cell identifier（CID）Multicast cells radio net it is interim
Identifier（MC-RNTI）The operation of multicast service is established in each in multiple mobile devices in multicast group（Such as in block
In 510）.The physical downlink control channel shielded followed by use by MC-RNTI（PDCCH）Physics is distributed for multicast group
Downlink shared data channel（PDSCH）The operation of resource（Such as in block 520）.
Establishing the operation of multicast service can include：Use radio resource control（RRC）Information element in signaling
（IE）Multicast configures each mobile device notification MC-RNTI into multicast group；For each mobile device distribution in multicast group
For response symbol（ACK）Or negative response symbol（NACK）The different physical uplink control channels of feedback resources instruction
（PUCCH）Resource；Use information element in RRC signaling（IE）PUCCH configure each mobile device notification into multicast group its
Distributed for the PUCCH resource of ACK or NACK feedback resources instruction；And/or it is the signal with less than predeterminated level and interference
Plus noise ratio（SINR）Multicast group in mobile device subset allocation be directed to ACK or NACK feedback resources instruction difference
PUCCH resource.Method 500 may further include：Before each mobile device notification MC-RNTI into multicast group,
The operation of RRC connections is established between multiple mobile devices and transfer station in multicast group.
Another operation of method 500 can include：After multicast service is established, scrambler is initialized using MC-RNTI
The scrambler seed of device, scrambler is carried out for the data in PDSCH.Following operation can also be included：Transmission PDCCH or
After data in PDSCH, ACK or NACK feedbacks are received from least one mobile device.
Another operation of method 500 can include：Data are retransmitted when NACK feedbacks are received or transmitted when mistake occurs.
Retransmitting the operation of data can include：Use cell specific reference signal（CRS）Or UE specific reference signals（UE-RS）To be single
Cell retransmits data；Or the use of CRS is that multiple cell retransmits data in the case of CRS intertextures are prohibited.In LTE,
CRS, which interweaves, can be referred to as non conflicting CRS, and non-interwoven CRS（For example, disabling CRS interweaves）Can by for conflict CRS.Institute
Stating another operation of method can include：When being less than the predeterminated level of subset mobile device in SINR from the shifting in multicast group
Subset mobile device in the subset of dynamic equipment uses mixed automatic repeat request when receiving NACK feedbacks（HARQ）Retransmit data.
Another example provides the method 600 for providing multicast service with unicast sub-frame by mobile device（Such as the stream in Fig. 7
Described in journey figure）.Methods described includes：There is generic cell identifier from transfer station reception multicast group（CID）Multicast it is small
Area's radio network temporary identifier（MC-RNTI）Operation, wherein, MC-RNTI is used radio resource control（RRC）Letter
Information element in order（IE）Multicast configuration is shared between multiple mobile devices（Such as in block 610）.Followed by：From transmission
Stand and receive by the physical downlink control channel of MC-RNTI shieldings（PDCCH）Operation（As in the block 620）.Methods described
Next operation can use MC-RNTI blind Detectings PDCCH（Such as in block 630）.
Receiving MC-RNTI operation can include：Receive the PUCCH resource point for the instruction of ACK or NACK feedback resources
Match somebody with somebody, wherein the PUCCH resource distribution and the PUCCH resource of other mobile devices in multicast group for the mobile device distribute
It is different.Method 600 may further include：After the transmission of the data in receiving PDSCH, ACK or NACK feedbacks are transmitted
Operation.
In another example, transfer station may be in the radio communication with mobile device.Fig. 8 provides mobile device
（Such as, user equipment（UE）, movement station（MS）, mobile wireless device, mobile communication equipment, flat board, hand-held set or other classes
The mobile wireless device of type）Example illustration explanation.Mobile device can include one or more antennas, the antenna configuration into
Transfer station（Such as, base station（BS））, evolved Node B（eNB）, Base Band Unit（BBU）, remote radio heads（RRH）, it is remote
Journey wireless device（RRE）, relay station（RS）, wireless device（RE）Or other kinds of wireless wide area network（WWAN）Connect
Access point is communicated.Mobile device can be configured to be communicated using at least one wireless communication standard, and the standard includes：
3GPP LTE, WiMAX, high-speed packet access（HSPA）, bluetooth（Bluetooth）And WiFi.Mobile device can use be directed to
The separate antenna of each wireless communication standard is communicated for the shared antenna of multiple wireless communication standards.Mobile device
Can be in WLAN（WLAN）, wireless personal-area network（WPAN）And/or communicated in WWAN.
Fig. 8 additionally provides the microphone and one or more that can be used for audio input and output from mobile device
Loudspeaker illustrates.Display screen can be liquid crystal display（LCD）Screen or other kinds of display screen, such as, have
Machine light emitting diode（OLED）Display.Display screen can be configured as touch-screen.Touch-screen can use electric capacity, resistance or
Other kinds of touch screen technology.Application processor and graphics processor can be coupled to internal storage, to provide processing
With the ability of display.Nonvolatile memory port may be utilized for data input/output intent option to be supplied to user.It is non-easy
The property lost port memory may be utilized for the memory span for extending mobile device.Keyboard can be integrated into one with mobile device
Rise, or be wirelessly connected to mobile device, inputted with providing additional user.Dummy keyboard can also be provided using touch-screen.
Various technologies or its some aspect or part, which can use, is embodied in tangible medium（Such as, floppy disk, CD-ROM, hard
Disk drive, non-transitorycomputer readable storage medium or any other machinable medium）In program code
（That is, instruct）Form, wherein, when described program code is loaded into machine（Such as, computer）In and held by machine
During row, the machine turns into the device for being used for implementing various technologies.The situation that program code on programmable computers performs
Under, the computing device can include：Processor, the storage medium that can be read by processor（Including volatibility and non-volatile
Memory and/or memory element）, at least one input equipment and at least one output equipment.The volatibility and non-volatile
Memory and/or memory element can be：RAM, EPROM, flash drive, optical drive, magnetic hard drive are used
In other media of storage electronic data.The base station and mobile device can also include：Transceiver module, counter module,
Processing module, and/or clock module or timer module.It can realize or one or more using various technologies described here
Individual program can use API（API）, reusable control etc..This class method can be with advanced procedure-oriented or face
Realized to the programming language of object, to be communicated with computer system.However, if it is desired to then（It is one or more）Journey
Sequence can also be realized with compilation or machine language.In any case, the language can be compiling or interpretative code, and
It is combined with hardware implementation mode.
It should be understood that：The many functional units described in this manual have been marked as module, so as to more particularly
Emphasize the independence of its implementation.For example, module may be implemented as hardware circuit, the hardware circuit includes：Customize VLSI
It is circuit OR gate array, ready-made（off-the-shelf）Semiconductor（Such as, logic chip, transistor）Or other discrete sets
Part.Module can also be in programmable hardware device（Such as, field programmable gate array, programmable logic array, FPGA
Equipment etc.）Middle realization.
Module can also be realized in the software for various types of computing devices.For example, executable code is known
Other module can include：One or more physically or logically blocks of computer instruction, it can for example be organized as object, process
Or function.However, the executable of institute's identification module need not be physically placed to together, but different positions can be included in
The entirely different instruction of middle storage is put, it includes the module when being joined logically together and realizes the module
Above-mentioned purpose.
In fact, the module of executable code can be single instruction, perhaps MIMD, and can even crossing over several
Memory devices, it is distributed between distinct program and on different code segments.Similarly, operation data herein can be in mould
Illustrated and identified in block, and any suitable form can be used and embodied, and be organized in any suitable type
In data structure.Operation data can be collected as individual data set, or can be distributed on diverse location（It is included in not
With in storage device）, and electronic signal can be at least partially, merely as and be present on system or network.The module can
To be inactive or movable, including it can be used to perform the agency of desired function.
Throughout this specification, the reference to " one embodiment " or " embodiment " means：Spy on embodiment description
Determine feature, structure or characteristic to be included at least one embodiment of the invention.Therefore, throughout each of this specification
The wording " in one embodiment " that occurs in position is not necessarily all referring to identical embodiment " in embodiment ".
As by using, multiple terms, structural detail, inscape, and/or material for convenience can be general herein
List in present.However, these lists should be interpreted each member as the list as individually and uniquely into
Member is identified individually.Therefore, the separate member of such list should not be based only upon it logical in the case of no conversely instruction
Equivalent on the fact that be interpreted any other member of same list with the presentation in group.In addition, the present invention's is each
Kind embodiment and example can be referenced together with the substitute of its various assemblies herein.It should be understood that：Such embodiment,
Example and substitute will be not construed as mutual actual equivalent, but be to be interpreted as independence of the invention and oneself
The expression controlled.
In addition, in one or more embodiments, can using it is any it is suitable by the way of combine described feature, knot
Structure or characteristic.In following description, there is provided numerous specific details, such as, the example of layout, distance, network are shown
Example etc., so as to provide the thorough understanding to the embodiment of invention.However, those skilled in the relevant art will be recognized that：The present invention
It can implement in the case of without one or more specific details, or using other methods, component, layout etc.
Implement.In other examples, well-known structure, material or operation are not illustrated in more detail or described, to avoid making this
The each side of invention obscures.
Although example before illustrates the principle of the present invention with one or more application-specifics, for the general of this area
Logical technical staff will be obvious that：Can be in the principle and the situation of concept without performing creative labour and without departing substantially from invention
Under make form, use and the numerous modifications of details of implementation.Therefore, except such as being limited by claims presented below
Outside, it is not intended to the limitation present invention.
Claims (22)
1. a kind of system that multicast service is provided by transfer station with unicast sub-frame, including：
Using the multicast cells radio network temporary identifier MC-RNTI with generic cell identifier CID in multicast group
Multiple mobile devices in each on establish the device of multicast service；And
The use of the physical downlink control channel PDCCH shielded by MC-RNTI is that multicast group distribution physical down link is shared
The device of data channel PDSCH resources;
Wherein described MC-RNTI is configured in multicast group using the information element IE multicasts in radio resource control RRC signaling
In multiple mobile devices between share.
2. the system as claimed in claim 1, wherein transfer station are being concentrated, in cooperation or cloud radio access network C-RAN.
3. the system as claimed in claim 1, wherein mobile device are selected from the group including user equipment (UE) and movement station MS
Select, and the transfer station is by from including Base Band Unit BBU, remote radio heads RRH, remote radio devices RRE, long-range
Selected in radio unit RRU and combinations thereof group, wherein BBU is connected to RRH, RRE or RRU by optical fiber.
4. the system as claimed in claim 1, wherein transfer station include at least one Base Band Unit BBU and multiple remote radios
Head end RRH, remote radio devices RRE or remote radio unit RRU, wherein optical fiber at least one BBU be connected to RRU,
RRE or RRU.
5. the system as claimed in claim 1, wherein the device for establishing multicast service further comprises：Use radio resource control
Information element IE multicasts configuration in RRC signaling processed to set the device of each mobile device in multicast group for multicast service,
Wherein IE multicasts configuration includes MC-RNTI.
6. the system as claimed in claim 1, further comprise：After multicast service device is established, MC-RNTI pairs is used
Data in PDSCH carry out the device of scrambler.
7. the system as claimed in claim 1, wherein the device for establishing multicast service further comprises：
The not jljl fed back for each mobile device distribution in multicast group for response character ACK or negative response character NACK
Manage the device of uplink control channel PUCCH resource；And
Each mobile device into multicast group is configured using the information element IE PUCCH in radio resource control RRC signaling
Send its PUCCH resource assigned unit fed back for ACK or NACK.
8. the system as claimed in claim 1, wherein the device for establishing multicast service further comprises：Based on less than predeterminated level
Delivery quality factor, be that the subset allocation of mobile device in multicast group is directed to response character ACK or negative response character
The device of the different physical uplink control channel PUCCH resources of NACK feedbacks, wherein when NACK feedbacks are by from mobile device
Subset receive when transfer station retransmit data.
9. the system as claimed in claim 1, further comprise：From at least one after the data in transmitting PDCCH or PDSCH
Individual mobile device receives the device of response character ACK or negative response character NACK feedbacks.
10. the system as claimed in claim 1, further comprise：Number is retransmitted when negative response character NACK feedbacks are received
According to device.
11. system as claimed in claim 10, wherein the device for retransmitting data further comprises：Believed using cell specific reference
Number CRS or UE specific reference signals UE-RS retransmits the device of data.
12. the system as claimed in claim 1, further comprise：Fail when in CRC for subset mobile device
When from the subset mobile device in the subset of the mobile device in multicast group receive negative response character NACK feedback when using mixed
Close the device that automatic repeat request HARQ retransmits data.
13. a kind of system that multicast service is provided by mobile device with unicast sub-frame, including：
The multicast cells radio net temporary mark with generic cell identifier CID for multicast group is received from transfer station
MC-RNTI device is accorded with, wherein MC-RNTI is configured using the information element IE multicasts in radio resource control RRC signaling
Shared between multiple mobile devices in multicast group；
The device of the physical downlink control channel PDCCH by MC-RNTI shieldings is received from transfer station；And
Use the device of PDCCH described in MC-RNTI blind Detectings.
14. system as claimed in claim 13, wherein mobile device are from positioned at concentration, cooperation or cloud radio access network C-
Transfer station in RAN receives MC-RNTI and the PDCCH shielded by MC-RNTI.
15. system as claimed in claim 13, wherein mobile device are by from the group including user equipment (UE) and movement station MS
Selection, and the transfer station includes at least one Base Band Unit BBU and multiple remote radio heads RRH, remote radio
At least one BBU is connected to RRH, RRE or RRU by equipment RRE or remote radio unit RRU, wherein optical fiber.
16. system as claimed in claim 13, wherein the device for receiving MC-RNTI further comprises：Reception is directed to response word
The physical uplink control channel PUCCH resource assigned unit of ACK or negative response character NACK feedbacks is accorded with, wherein described
The PUCCH resource distribution of mobile device is different from the PUCCH resource distribution of other mobile devices in multicast group.
17. system as claimed in claim 16, further comprises：When the cyclic redundancy check (CRC) on PDSCH provides significant figure
According to when transmit ACK or when on PDSCH CRC fail when transmit NACK feedback device.
18. system as claimed in claim 13, wherein the mobile device includes：Antenna, touch-sensitive display screen, raise one's voice
Device, microphone, graphics processor, application processor, internal storage, nonvolatile memory port or its combination.
19. a kind of transfer station that multicast service is provided with unicast sub-frame, including：
Processing unit, for generating the multicast cells radio network temporary identifier MC- with generic cell identifier CID
RNTI, using physical downlink control channel PDCCH physics down-link data channel PDSCH resources are distributed, and used
MC-RNTI shields the PDCCH；And
Transceiver devices, for using the information element IE multicasts configuration in radio resource control RRC signaling PDCCH with
MC-RNTI is sent to mobile device, and wherein transfer station includes at least one Base Band Unit BBU and multiple remote radio heads
At least one BBU is connected to RRH, RRE by RRH, remote radio devices RRE or remote radio unit RRU, wherein optical fiber
Or RRU;
Wherein described MC-RNTI is configured in multicast group using the information element IE multicasts in radio resource control RRC signaling
In multiple mobile devices between share.
20. transfer station as claimed in claim 19, wherein：
Processing unit is configured to：Response character ACK or negative response character NACK is directed to the generation of at least two mobile devices
The physical uplink control channel PUCCH resource distribution of feedback resources instruction, wherein the multicast group with PUCCH resource distribution
In each mobile device distributed from other mobile devices that PUCCH resource is distributed with different PUCCH resource；And
Transceiver devices are configured to：PUCCH resource distribution is sent to each mobile device using RRC signaling, from least one
Individual mobile device receives ACK or NACK feedbacks, and retransmits mixed automatic repeat request HARQ when NACK feedbacks are received.
21. a kind of non-transitorycomputer readable storage medium, it is stored thereon with computer readable program code, the computer
Readable program code is suitable to be executable to implement the method for providing multicast service with unicast sub-frame by transfer station, wherein the calculating
Machine readable program code is performed to：
Using the multicast cells radio network temporary identifier MC-RNTI with generic cell identifier CID in multicast group
Multiple mobile devices in each on establish multicast service；And
The use of the physical downlink control channel PDCCH shielded by MC-RNTI is that multicast group distribution physical down link is shared
Data channel PDSCH resources；
Wherein described MC-RNTI is configured in multicast group using the information element IE multicasts in radio resource control RRC signaling
In multiple mobile devices between share.
22. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer readable program code, wherein the meter
Calculation machine readable program code is suitable to be executable to implement the method for providing multicast service with unicast sub-frame by mobile device, wherein institute
Computer readable program code is stated to be performed to：
The multicast cells radio net temporary mark with generic cell identifier CID for multicast group is received from transfer station
MC-RNTI is accorded with, wherein MC-RNTI is configured in multicast using the information element IE multicasts in radio resource control RRC signaling
Shared between multiple mobile devices in group；
The physical downlink control channel PDCCH shielded by MC-RNTI is received from transfer station；And
Use PDCCH described in MC-RNTI blind Detectings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2011/054460 WO2013048514A1 (en) | 2011-09-30 | 2011-09-30 | Multicast service using unicast subframe |
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|---|---|
| CN103947142A CN103947142A (en) | 2014-07-23 |
| CN103947142B true CN103947142B (en) | 2018-03-30 |
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|---|---|---|---|
| CN201180075196.5A Active CN103947142B (en) | 2011-09-30 | 2011-09-30 | Use the multicast service of unicast sub-frame |
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| EP (1) | EP2761796A4 (en) |
| CN (1) | CN103947142B (en) |
| WO (1) | WO2013048514A1 (en) |
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| WO2013048514A1 (en) | 2013-04-04 |
| US9467819B2 (en) | 2016-10-11 |
| EP2761796A1 (en) | 2014-08-06 |
| EP2761796A4 (en) | 2015-07-15 |
| CN103947142A (en) | 2014-07-23 |
| US20140226552A1 (en) | 2014-08-14 |
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